CN107540938A - A kind of modified polypropene reclaimed materials and preparation method thereof - Google Patents
A kind of modified polypropene reclaimed materials and preparation method thereof Download PDFInfo
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- CN107540938A CN107540938A CN201610511016.8A CN201610511016A CN107540938A CN 107540938 A CN107540938 A CN 107540938A CN 201610511016 A CN201610511016 A CN 201610511016A CN 107540938 A CN107540938 A CN 107540938A
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Abstract
The present invention discloses a kind of modified polypropene reclaimed materials and preparation method thereof, and it is prepared by weight by following components：30 ~ 75 parts of polypropylene reclaimed material, 10 ~ 30 parts of low density polyethylene (LDPE), polypropylene grafted 5 ~ 15 parts of acrylic acid, 10 ~ 25 parts of alkali-free glass fiber, 0.01 ~ 0.02 part of antioxidant, 2,5 0.5 ~ 2 part of dimethyl 2,5 pairs (tert-butyl peroxy base) hexanes.The present invention adds polypropylene grafted acrylic acid in polypropylene reclaimed material and introduces highly polar reactive group, and with 2,5 dimethyl 2,5 pairs of (tert-butyl peroxy base) hexane collective effects, improve intensity of material, cohesion, dispersive property etc., the making such as arrangements for automotive doors available for the product that had higher requirements to rigid-tough balance is marked time body.And laundry machine barrel waste material is rationally recycled, so as to economize on resources, environmental protection.
Description
Technical field
The invention belongs to field of high polymer material modification and processing technique field, and in particular to a kind of modified polypropene
Reclaimed materials and preparation method thereof.
Background technology
Polypropylene is a kind of thermoplastic, and its light specific gravity, elasticity are high, and finished product case hardness is big；Also have in addition resistance to
The features such as hot, chemical stability, good insulating properties, it is widely used in fields such as auto parts and components, household electrical appliance.But
It is with industrial expansion, polyacrylic discarded amount increases year by year, and in recent years, the recovery problem of waste or used plastics increasingly obtains greatly
The concern of family, many enterprises proceed by being modified again for reclaimed materials.
Laundry machine barrel is generally COPP material and is made, and it is filled less, high melt index, shock resistance height.China is every
The washing machine of millions of is scrapped in annual meeting, and is being increased with average annual 20% speed.If resulting laundry machine barrel waste material can obtain
Recycle, can economize on resources to reasonable, environmental protection, reduce and waste.
Because the polypropylene material of recovery causes its performance substantially to decay because of aging, degraded etc., and in reclaimed materials again
In granulation process, polypropylene segment can be destroyed and degraded again.Therefore in order to preferably utilize reclaimed materials, it can typically be carried out
It is modified again, to improve polyacrylic intensity and ageing-resistant performance.Presently mainly in general plastics are carried out by glass fibre
It is modified to strengthen its mechanical performance, but modification of the glass fibre to polypropylene reclaimed material does not reach polypropylene virgin material standard still.
The content of the invention
It is an object of the invention to provide a kind of modified polypropene reclaimed materials and preparation method thereof.
Technical scheme is as follows：
The invention provides a kind of modified polypropene reclaimed materials, the material is made up of the component of following parts by weight：
Polypropylene reclaimed material：30~75 parts,
Low density polyethylene (LDPE)：10~30 parts,
Polypropylene grafted acrylic acid：5~15 parts,
Alkali-free glass fiber：10~25 parts,
Antioxidant：0.01~0.02 part,
Double (tert-butyl peroxy base) hexanes of 2,5- dimethyl -2,5-：0.5~2 part.
The polypropylene reclaimed material is waste and old polypropylene laundry machine barrel reclaimed materials, and its ash content is 2~10%, density 0.91
~0.98g/cm3, melt index is 10~40g/10min in the case of 230 DEG C/2.16Kg.
Grafting rate >=1.5% of described polypropylene grafted acrylic acid, weight average molecular weight >=20000.
Described antioxidant is that antioxidant 616 (paracresol and dicyclopentadiene butylation product) is (double with antioxidant 626
(2,4- DI-tert-butylphenol compounds) pentaerythritol diphosphites) it is 1 by weight：The mixture of 1 mixing.
Described alkali-free glass fiber is alkali-free long glass fibres, and its filament diameter is 20~30 microns.
Double (tert-butyl peroxy base) hexanes of described 2,5- dimethyl -2,5- are the white powder of purity 50%, and it decomposes temperature
Spend for 179 DEG C.
The preparation method of the modified polypropene reclaimed materials of the present invention comprises the following steps, and first reclaims 30~75 parts of polypropylene
Material, 10~30 parts of low density polyethylene (LDPE)s, 5~15 parts of polypropylene grafted acrylic acid, 0.01~0.02 part of antioxidant and 0.5~2 part
Double (tert-butyl peroxy base) hexanes of 2,5- dimethyl -2,5- are put into high-speed mixer together to be mixed 3~5 minutes；Then will mixing
Thing is added in extruder, while 10~25 parts of alkali-free glass fibers are added from glass fiber opening, and extrusion, pelletizing produce modified polypropene recovery
Material；Described extruder is double screw extruder, and its barrel temperature is 180~220 DEG C.
Beneficial effects of the present invention：
1st, the present invention adds polypropylene grafted acrylic acid in polypropylene reclaimed material and introduces highly polar reactive group, makes
Material has high polarity and reactivity, greatly improves the compatibility of polypropylene and fiber；
2nd, double (tert-butyl peroxy base) hexanes of 2,5- dimethyl -2,5- added in the present invention are total to polypropylene grafted acrylic acid
Same-action reaches combines closely with polymer, significantly improves intensity, cohesion, dispersive property of material etc., finally makes system
The modified polypropene reclaimed materials obtained has good dispersiveness, compatibility, excellent rigid-tough balance, available for rigidity-toughness balanced
The have higher requirements making such as arrangements for automotive doors of product of property is marked time body.
3rd, the purpose of low density polyethylene (LDPE) is added in the present invention is the viscosity of melt when adjusting melting extrusion, makes melt dispersion good
And it is well mixed, so as to broken strip when solving extrusion, stop up the problems such as die head.
4th, the present invention mixes the special antioxidant formed using antioxidant 616 with antioxidant 626, and its dosage is only 0.01-
0.02 part, greatly reduce the dosage of antioxidant, and common antioxidant dosage minimum 0.5% or so；In addition, antioxidant 616
Paracresol and dicyclopentadiene butylation product, molecular weight are 600~700, have splendid dispersiveness or compatibility；Antioxidant
Good compatibility is respectively provided between 626 and polypropylene, low density polyethylene (LDPE), also with certain light stabilization.The present invention
Heat does not occur during production, processing and final use using the mixture energy protection materials of antioxidant 616 and antioxidant 626
Oxidative degradation, so as to maintain the mechanical property of material well.
5th, the present invention is made it rationally be recycled, can economized on resources, environmental protection, reduced using machine barrel waste material of doing washing
Waste.
Embodiment
The present invention is further illustrated with reference to embodiments.
Tensile strength of the comprehensive mechanical property of material as obtained by test, bending strength, impact strength and density
Numerical value is judged that the performance test results are shown in Table 1.
Antioxidant used in example below is antioxidant 616 and antioxidant 626 is 1 by weight：1 mixing mixes
Compound.
Embodiment 1
By 75 parts of polypropylene reclaimed materials, 10 parts of low density polyethylene (LDPE)s, 5 parts of polypropylene grafted acrylic acid, 0.01 part of antioxidant
It is put into high-speed mixer and mixes 3 minutes together with double (tert-butyl peroxy base) hexanes of 2 parts of 2,5- dimethyl -2,5-, then will be mixed
Compound is added in extruder, 10 parts of alkali-free glass fibers is added from glass fiber opening, extrusion pelletizing obtains modified polypropene reclaimed materials.
Each zone temperatures of barrel of double screw extruder are respectively set to：One 180 DEG C of area, 185 DEG C of 2nd area, 195 DEG C of 3rd area,
Four 195 DEG C of areas, 200 DEG C of 5th area, 200 DEG C of 6th area, 205 DEG C of head.Extrusion bar is cooled to room temperature by circulating water chennel, by blowing
Machine enters pelleter after drying and is granulated.
Embodiment 2
By 30 parts of polypropylene reclaimed materials, 30 parts of low density polyethylene (LDPE)s, 15 parts of polypropylene grafted acrylic acid, 0.02 part of antioxidant
It is put into high-speed mixer and mixes 4 minutes together with double (tert-butyl peroxy base) hexanes of 0.5 part of 2,5- dimethyl -2,5-, then will
Mixture is added in extruder, 25 parts of alkali-free glass fibers is added from glass fiber opening, extrusion pelletizing obtains modified polypropene reclaimed materials.
Each zone temperatures of barrel of double screw extruder are respectively set to：One 180 DEG C of area, 185 DEG C of 2nd area, 195 DEG C of 3rd area,
Four 195 DEG C of areas, 210 DEG C of 5th area, 220 DEG C of 6th area, 205 DEG C of head.Extrusion bar is cooled to room temperature by circulating water chennel, by blowing
Machine enters pelleter after drying and is granulated.
Embodiment 3
By 52 parts of polypropylene reclaimed materials, 20 parts of low density polyethylene (LDPE)s, 10 parts of polypropylene grafted acrylic acid, 0.02 part of antioxidant
It is put into high-speed mixer and mixes 5 minutes together with double (tert-butyl peroxy base) hexanes of 1 part of 2,5- dimethyl -2,5-, then will be mixed
Compound is added in extruder, 18 parts of alkali-free glass fibers is added from glass fiber opening, extrusion pelletizing obtains modified polypropene reclaimed materials.
Each zone temperatures of barrel of double screw extruder are respectively set to：One 180 DEG C of area, 185 DEG C of 2nd area, 195 DEG C of 3rd area,
Four 195 DEG C of areas, 200 DEG C of 5th area, 200 DEG C of 6th area, 205 DEG C of head.Extrusion bar is cooled to room temperature by circulating water chennel, by blowing
Machine enters pelleter after drying and is granulated.
Modified polypropene reclaimed materials prepared by above-described embodiment 1-3 is molded into batten through standard, and performance is as shown in table 1.Together
When by it is existing 230 DEG C melt index is 40~100g/10min in the case of 2.16Kg polypropylene and waste and old polypropylene do washing
(its ash content is 2~10% to machine barrel reclaimed materials, density is 0.91~0.98g/cm3, in the case of 230 DEG C/2.16Kg melt index
For 10~40g/10min) as comparative example, equally it is molded into batten and detects its performance, it is as shown in table 1 below.
Table 1
It can be seen that from upper table 1, the mechanicalness such as the tensile strength of modified polypropene reclaimed materials prepared by the present invention, bending strength
Common polypropylene reclaimed material can be significantly better than, is also significantly better than polypropylene material.So modified polypropene prepared by the present invention
Reclaimed materials has excellent rigidity-toughness balanced performance, improves its application；And laundry machine barrel waste material is rationally recycled, it is real
Now economize on resources, environmental protection.
The above-mentioned description to embodiment is understood that for ease of those skilled in the art and using this hair
It is bright.Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein
General Principle is applied in other embodiment without by performing creative labour.Therefore, the invention is not restricted to implementation here
Example, for those skilled in the art according to the announcement of the present invention, not departing from improvement that scope made and modification all should be
Within protection scope of the present invention.
Claims (7)
- A kind of 1. modified polypropene reclaimed materials, it is characterised in that：It is prepared by weight by following components：Polypropylene reclaimed material：30 ~ 75 parts,Low density polyethylene (LDPE)：10 ~ 30 parts,Polypropylene grafted acrylic acid：5 ~ 15 parts,Alkali-free glass fiber：10 ~ 25 parts,Antioxidant：0.01 ~ 0.02 part,Double (tert-butyl peroxy base) hexanes of 2,5- dimethyl -2,5-：0.5 ~ 2 part.
- A kind of 2. modified polypropene reclaimed materials according to claim 1, it is characterised in that：The polypropylene reclaimed material is useless Old polypropylene laundry machine barrel reclaimed materials, its ash content is that 2 ~ 10%, density is 0.91 ~ 0.98g/cm3, in 230 DEG C/2.16Kg situations Lower melt index is 10 ~ 40g/10min.
- A kind of 3. modified polypropene reclaimed materials according to claim 1, it is characterised in that：Described polypropylene grafted propylene Grafting rate >=1.5% of acid, weight average molecular weight >=20000.
- A kind of 4. modified polypropene reclaimed materials according to claim 1, it is characterised in that：Described antioxidant is antioxidant 616 with antioxidant 626 by weight be 1：The mixture of 1 mixing.
- A kind of 5. modified polypropene reclaimed materials according to claim 1, it is characterised in that：Described alkali-free glass fiber is alkali-free Long glass fibres, its filament diameter are 20 ~ 30 microns.
- A kind of 6. modified polypropene reclaimed materials according to claim 1, it is characterised in that：Described 2,5- dimethyl -2, Double (tert-butyl peroxy base) hexanes of 5- are the white powder of purity 50%, and its decomposition temperature is 179 DEG C.
- A kind of 7. preparation method of modified polypropene reclaimed materials as claimed in claim 1, it is characterised in that：It is first poly- by 30 ~ 75 parts Propylene recovery material, 10 ~ 30 parts of low density polyethylene (LDPE)s, 5 ~ 15 parts of polypropylene grafted acrylic acid, 0.01 ~ 0.02 part of antioxidant and 0.5 ~ Double (tert-butyl peroxy base) hexanes of 2 parts of 2,5- dimethyl -2,5- are put into high-speed mixer together to be mixed 3 ~ 5 minutes；Then will be mixed Compound is added in extruder, while 10 ~ 25 parts of alkali-free glass fibers are added from glass fiber opening, and extrusion, pelletizing produce modified polypropene and returned Rewinding；Described extruder is double screw extruder, and its barrel temperature is 180 ~ 220 DEG C.
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|---|---|---|---|---|
| CN108948631A (en) * | 2018-05-24 | 2018-12-07 | 中北大学 | Waste and old polypropylene long-branched material and preparation method thereof |
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